And also by someone else, it's a secret, I just can't say who, but I know that person.

Yeah but seriously, when I ask that person if he's doing what he is supposed to be doing, he doesn't answer me a direct answer, he just says "You'll know soon". That's a yes for me.
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OK, made a lot of progress, my editor might be able to view at least 1-1 now.
Edit: It's very buggy, I get this error:
in LoadTilesetNames
"struct.error: unpack_from requires a buffer of at least 128 bytes"

I remember me and Treeki talking about that NSMBU textures requires a buffer of 128 bytes, I seriously don't know what to do know.

OK 99% finished working on my editor to let it view NSMBU levels, give me some time people, I might show a screenshot today or tomorrow if I can. _________________________Join the New Mario Team today!

How can I let Treeki give me his editor? Impossible dude.
How can I let RoadrunnerWMC give me his editor if I can't contact him in the first place????
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